Denver ceramics genius Martha Daniels threw everything into Grotto, her outlandish installation in which most elements were made of clay. She painted the walls, created architectural elements and even put in an operable fountain. The resulting atmosphere was dark and heavy, exactly her intention, since the show was meant to evoke the spirit of the ancient grottos of Italy. But despite her historical sources — like those requisite Venus sculptures — Daniels also threw in some of her futuristic robot figures.